<template>
  <div class="xtx-infinite-loading" ref="container">
    <div class="loading" v-if="loading">
      <span class="img"></span>
      <span class="text">正在加载...</span>
    </div>
    <div class="none" v-if="finished">
      <span class="img"></span>
      <span class="text">亲，没有更多了</span>
    </div>
  </div>
</template>

<script setup>
import { ref, defineProps, defineEmits } from 'vue'
import { useIntersectionObserver } from '@vueuse/core'
  const props = defineProps({
    loading: {
      type: Boolean,
      default: false
    },
    finished: {
      type: Boolean,
      default: false
    }
  })
  const emit = defineEmits()
  const container = ref(null)
  useIntersectionObserver(
    container,
    ([{ isIntersecting }], dom) => {
      if (isIntersecting) {
        if (props.loading === false && props.finished === false) {
          emit('infinite')
        }
      }
    },
    {
      threshold: 0
    }
  )
  
</script>

<style scoped lang='less'>
.xtx-infinite-loading {
  .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    .img {
      width: 50px;
      height: 50px;
      background: url(../assets/images/load.gif) no-repeat center / contain;
    }
    .text {
      color: #999;
      font-size: 16px;
    }
  }
  .none {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    .img {
      width: 200px;
      height: 134px;
      background: url(../assets/images/none.png) no-repeat center / contain;
    }
    .text {
      color: #999;
      font-size: 16px;
    }
  }
}
</style>